It is because of BSEP. They can only upgrade or add buses to
BSEP. They cannot fleet upgrade on SMRT buses.
Hence, bulk of SMRT DDs will be seen going to only services 176,
188, 190, 963 as of now.
I think 962 might be next to get 1 DD from BSEP. Even sv 75
might get.
I do agree that just 1 DD in the whole fleet does not make a
huge difference.
For 187, 3559X was full house at ITE and Jurong West, enroute
from WRI to BNL on 12.45PM slot... Then from BNL > WDL, the load
was gd...